The scale of a map is 1: 500 000.(a) The actual distance between two t

1.	The scale of a map is 1: 500 000.(a) The actual distance between two towns is 172 km.Calculate the distance, between the towns on the map. (b) The area of a lake on the map is 12 cm^2. Calculate the actual area of the lake in km^2
Answer» ANSWER: A) 1/500000km = 0.000002 So, 1 KM = 0.000002 ∴ 172 km on land =172/0.000002 on the map = 86000000 on the map B) $12 cm^{2}$ =12x12 =144 so, $1cm^{2}$ = 500000 X 500000 =250,000,000,000 = 250,000,000,000 x 12 = 3,000,000,000,000 $km^{2}$ is the area of the lake